EXHAUST PURIFICATION FILTER

Provided is an exhaust purification filter that is able to reduce pressure loss and that has high exhaust purification performance and particulate matter trapping performance. This exhaust purification filter comprises a filter substrate having a wall flow structure, and an exhaust purification catalyst supported on a partition wall of the filter substrate. The volume-based median pore diameter (D50) of the filter substrate is 18 [mu]m or greater, the full width at half maximum of the pore distribution of the filter substrate is 7 [mu]m to 15 [mu]m, and the exhaust purification catalyst is supported in an unevenly distributed manner in a high-density layer in which the density of the exhaust purification catalyst is relatively high and a low-density layer in which the density of the exhaust purification catalyst is relatively low. 本发明所要解决的问题在于，提供一种排气净化过滤器，其能够降低压损，并且具有高排气净化性能及颗粒状物质捕捉性能。为了解决上述问题，本发明提供一种排气净化过滤器，其具备壁流结构的过滤器基材、及担载于过滤器基材的间隔壁上的排气净化催化剂，过滤器基材的基于体积基准的中位气孔直径(D50)为18μm以上，过滤器基材的气孔分布的半宽度为7μm～15μm，排气净化催化剂不均